试题与答案

碗扣式钢管脚手架的核心部件是(),它是由上碗扣、下碗扣,横杆接头和()组成。

题型:填空题

题目:

碗扣式钢管脚手架的核心部件是(),它是由上碗扣、下碗扣,横杆接头和()组成。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C

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